// Copyright (C) 2013 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 13.6.4.13 S5.c
description: >
    If Type(result) is not Object, throw a TypeError exception as per
    `IteratorNext` (7.4.2 S4)
features: [Symbol.iterator]
---*/

function Test() {
    var iterable = {};
    var firstIterResult;

    iterable[Symbol.iterator] = function() {
      var finalIterResult = { value: null, done: true };
      var nextIterResult = firstIterResult;

      return {
        next: function() {
          var iterResult = nextIterResult;

          nextIterResult = finalIterResult;

          return iterResult;
        }
      };
    };

    firstIterResult = true;
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = false;
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = 'string';
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = undefined;
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = null;
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = 4;
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = NaN;
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = Symbol('s');
    assert.throws(TypeError, function() {
      for (var x of iterable) {}
    });

    firstIterResult = /regexp/;
    for (var x of iterable) {}

    firstIterResult = {};
    for (var x of iterable) {}

    firstIterResult = new Proxy({}, {
      get: function(receiver, name) {
        if (name === 'done') {
          return true;
        }
        if (name === 'value') {
          return null;
        }
        throw new Test262Error('This code is unreachable.');
      }
    });
    for (var x of iterable) {
      throw new Test262Error('This code is unreachable.');
    }

    firstIterResult = new Proxy({}, {
      get: function(receiver, name) {
        if (name === 'done') {
          return false;
        }
        if (name === 'value') {
          return 23;
        }
        throw new Test262Error('This code is unreachable.');
      }
    });
    var i = 0;
    for (var x of iterable) {
      assert.sameValue(x, 23);
      i++;
    }
    assert.sameValue(i, 1);
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
